What's wrong with Porsche 9 1 1 idling instability?

Most of them are related to dirty throttle. For a car with a throttle, if there is carbon deposit or other dirt at the throttle, the air intake will be reduced. Idle valve is damaged, or the computer board is broken, and the air inlet pipe leaks.

Engine idling instability refers to the change of gas acting force in the cylinder, which causes the imbalance of power in each cylinder, resulting in the inconsistency of horizontal component of each piston during the power stroke, resulting in the imbalance of engine lateral shaking torque and engine shaking. Engine idling instability is the most common fault in engine maintenance. If the diagnosis idea is incorrect, it will prolong the maintenance time and reduce the work efficiency.

① The direct cause refers to the dirty, worn and incorrect installation of mechanical parts, which leads to changes in the power of individual cylinders, resulting in unbalanced power of each cylinder and unstable idle speed of the engine; (2) The indirect cause refers to the abnormality of the electronic control system of the engine, which leads to poor combustion of the mixed gas, which makes it difficult to balance the power of each cylinder and makes the engine idling unstable.

(Photo/Text/Photo: Shi Lili) @20 19